This circuit is from a 1990s publication by William Sheets. The circuit consists of a stage whose gain is adjusted according to the signal intensity.
circuit is used to increase the sensivity of a relay. A 50 to 100 mA relay can be triggered with...
This symmetric 30 mA x 15 V power supply was found in the Ferranti transistor manual from 1974....
This circuit causes the powered lamp to fluctuate in brightness by 20% intensity. It can be used...